dscale 0.7.1

// DScale: deterministic distributed systems simulator
// Copyright (C) 2026  Konstantin Shprenger

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

use log::debug;

use crate::Jiffies;

#[derive(Default)]
pub(super) struct Clock {
    now: Jiffies,
}

impl Clock {
    pub(super) fn fast_forward(&mut self, future: Jiffies) {
        debug_assert!(self.now <= future, "Future < Present");
        if self.now < future {
            debug!("Global time changed: {} -> {future}", self.now);
            self.now = future;
        }
    }

    pub(crate) fn now(&self) -> Jiffies {
        self.now
    }
}